2172973929 has 8 divisors (see below), whose sum is σ = 3311198400. Its totient is φ = 1241699376.

The previous prime is 2172973927. The next prime is 2172973981. The reversal of 2172973929 is 9293792712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2172973929 - 2¹ = 2172973927 is a prime.

It is a super-2 number, since 2×2172973929² = 9443631392227394082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2172973927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51737454 + ... + 51737495.

It is an arithmetic number, because the mean of its divisors is an integer number (413899800).

Almost surely, 2^2172973929 is an apocalyptic number.

It is an amenable number.

2172973929 is a deficient number, since it is larger than the sum of its proper divisors (1138224471).

2172973929 is a wasteful number, since it uses less digits than its factorization.

2172973929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103474959.

The product of its digits is 857304, while the sum is 51.

The square root of 2172973929 is about 46615.1684433297. The cubic root of 2172973929 is about 1295.2437497279.

The spelling of 2172973929 in words is "two billion, one hundred seventy-two million, nine hundred seventy-three thousand, nine hundred twenty-nine".